Polycyclic Aromatic Hydrocarbons (PAHs) Testing

Advanced Analytical Testing of Polycyclic Aromatic Hydrocarbons (PAHs): High‑Sensitivity Detection and Comprehensive Profiling for Environmental and Consumer Product Safety

Polycyclic aromatic hydrocarbons (PAHs)—a large class of organic compounds with two or more fused aromatic rings—are ubiquitous environmental pollutants formed during incomplete combustion of organic matter. They are of significant concern due to their carcinogenic, mutagenic, and teratogenic properties. Regulatory bodies worldwide, including the US EPA, EU REACH, and China GB standards, have established strict limits for PAHs in air, water, soil, food contact materials, toys, electronics, and rubber products. Reliable detection and quantification of PAHs require ultra‑trace sensitivity, robust extraction methods, and interference‑free separation due to the complex matrices in which they occur. Our laboratory offers a fully integrated, multi‑technique analytical platform specifically designed for the rigorous determination of PAHs, combining advanced sample preparation (pressurised liquid extraction, QuEChERS, SPE), high‑resolution chromatographic separation (GC and LC), and tandem mass spectrometry (MS/MS and HRMS) detection. We deliver quantitative, diagnostic, and regulatory‑compliant data that supports environmental monitoring, product safety compliance, risk assessment, and source apportionment for industrial, governmental, and consulting clients worldwide.

Why Comprehensive Testing of PAHs Is Critical for Regulatory Compliance and Human Health Protection

Clients seeking PAH testing often face challenges such as complex sample matrices causing ion suppression, co‑elution of isomeric PAHs (e.g., benzo[b]fluoranthene vs. benzo[k]fluoranthene), and extremely low detection limits required by regulations. These issues demand high‑performance instrumentation and experienced method development to achieve reliable results. Moreover, the diversity of PAH compounds (EPA 16, EU 15+1, PAH4, or PAH8) and their varying physicochemical properties require tailored extraction and analysis conditions. Our service provides a systematic characterisation that quantifies target PAHs at sub‑ppb to low‑ppb levels in air (particulate and gaseous), water, soil, sediment, foodstuffs, toys, and consumer goods, with strict adherence to ISO 17025, EPA methods (e.g., 8270E, 8100, 8310), and EN 15980 standards. By offering full method validation, quality control (surrogate and internal standards), and interpretative reporting, we empower clients to demonstrate compliance, identify contamination sources, and mitigate health risks with confidence.

Our Analytical Capabilities: From Sample Preparation to Ultra‑Trace Detection and Compound Confirmation

Our testing framework is structured into five interconnected modules, each addressing a critical aspect of PAH analysis:

Comprehensive sample preparation and extraction—We employ pressurised liquid extraction (PLE), accelerated solvent extraction (ASE), Soxhlet extraction, and QuEChERS methods tailored to the matrix (soil, water, biota, polymers). For complex matrices, we utilise solid‑phase extraction (SPE) with appropriate sorbents (e.g., C18, Florisil, silica gel) and gel permeation chromatography (GPC) for lipid removal. Our protocols are optimised to achieve high recoveries (85‑105 %) and low matrix effects, ensuring accurate quantification even at trace levels.

High‑resolution chromatographic separation—We use gas chromatography (GC) with either flame ionisation detection (FID) or mass spectrometry (MS) for volatile PAHs, and high‑performance liquid chromatography (HPLC) with fluorescence (FLD) or diode‑array (DAD) detection for thermally labile or less volatile PAHs. For maximal separation power, we employ capillary GC columns with stationary phases optimised for PAH isomer resolution (e.g., DB‑5MS, DB‑EUPAH), and UPLC with reversed‑phase C18 columns for LC‑based methods. We resolve critical isomer pairs (e.g., chrysene and triphenylene; benzo[a]anthracene and chrysene) to deliver accurate individual compound data.

Tandem and high‑resolution mass spectrometry—For detection, our primary workhorses are GC‑MS/MS (triple quadrupole) and GC‑HRMS, providing unparalleled sensitivity (sub‑pg limits of detection), selectivity, and interference removal via multiple reaction monitoring (MRM) or high‑resolution extracted ion chromatography. For polar or high‑molecular‑weight PAH derivatives, we utilise LC‑MS/MS (QqQ) and LC‑HRMS (Q‑TOF). We routinely achieve detection limits of 0.1‑1 ng/g in solids and 0.1‑10 ng/L in water, meeting the most stringent regulatory requirements (e.g., EU Water Framework Directive, Toy Safety Directive EN 71‑3).

Data processing and quality assurance—We employ isotope‑dilution or internal standard quantification (using deuterated PAH standards) to correct for matrix effects and recovery variations. Every batch includes method blanks, laboratory control samples (LCS), and matrix spikes to ensure data integrity. Our validated data review includes peak integration, signal‑to‑noise ratio, and ion ratio confirmation for MS/MS transitions, ensuring that no false positives or negatives are reported.

Specialised services: source apportionment and toxic equivalency—Beyond routine quantification, we offer diagnostic ratio analysis (e.g., Fla/Pyr, BaA/Chry, IP/(IP+BghiP)) to identify potential emission sources (petrogenic, pyrogenic, or biogenic). We also calculate toxic equivalency factors (TEFs) and provide benzo[a]pyrene toxicity equivalency (TEQ) values to support risk assessment.

High‑Level Diagnostic and Predictive Modelling

We integrate analytical data with statistical and chemometric tools to evaluate PAH profiles, identify correlations, and predict potential sources using principal component analysis (PCA) and positive matrix factorisation (PMF). This added value aids environmental consultants and site owners in developing effective remediation strategies. We also provide trend analysis for long‑term monitoring projects, helping clients track pollution over time and evaluate the effectiveness of mitigation measures.

Regulatory Compliance and Quality Assurance

All test methods are aligned with EPA, ISO, EN, and national regulatory standards (e.g., US EPA SW‑846, EPA 8270E, ISO 18287, EN 16190, DIN 38414). Our laboratory is ISO/IEC 17025:2017 accredited for a broad scope of PAH testing in environmental and product matrices. We issue certified test reports with complete measurement uncertainty, traceability to NIST/CRM standards, and comprehensive quality control data (blanks, surrogates, duplicates). For regulatory submissions, we supply data packages in formats compatible with US EPA CLP, EU ECHA, and national permitting agencies.

Our Distinctive Advantages in PAH Testing

Unmatched isomer separation and sensitivity: Our GC‑MS/MS platforms with specialised columns resolve critical PAH isomers that commonly co‑elute (e.g., benzo[b]fluoranthene, benzo[k]fluoranthene, and benzo[j]fluoranthene), ensuring accurate speciation—a vital requirement for toxic equivalency calculations. Many routine labs provide only summed PAH values, but we deliver individual isomer concentrations to support precise risk assessment.

Comprehensive method flexibility: We can tailor extraction and clean‑up procedures for virtually any matrix—from drinking water and wastewater to soil, sludge, airborne particulate matter (PM10, PM2.5), food packaging, rubber, plastics, and cosmetics. Our method library includes over 50 validated protocols for different matrices and target PAH lists (EPA 16, EU 15+1, PAH4, PAH8, and customised suites).

High‑throughput and rapid turnaround: Our automated sample preparation (ASE, SPE, and liquid handling) coupled with fast GC and UPLC systems allows us to process large‑scale monitoring projects efficiently. Standard turnaround is 7‑10 business days for routine batches, with expedited 48‑hour service for urgent projects.

Expert interpretation and source identification: Our senior scientists include environmental chemists with decades of experience in PAH analysis and source fingerprinting. We provide interpretive reports that go beyond numbers—including potential source categories, toxic equivalency profiles, and recommendations for risk management.

Continuous investment in state‑of‑the‑art instrumentation: We maintain a fleet of high‑end GC‑MS/MS, GC‑HRMS, and LC‑HRMS instruments, ensuring that we can meet the evolving needs of our clients, including the analysis of oxygenated and nitrated PAH derivatives (oxy‑PAHs, NPAHs) where required.

End‑to‑End Service Workflow

We initiate each project with a complimentary technical consultation to define your specific matrix, target PAH list, detection limits, and regulatory framework. We design a tailored test plan, including sampling guidelines, preservation requirements, and shipping instructions. Upon sample receipt, we perform receipt inspection and log all information. All tests are executed with strict QA/QC—method blanks, surrogates, duplicates, and certified reference materials. Data are reviewed by a second senior analyst, then compiled into a comprehensive report containing tabulated results, chromatograms, summary statistics, and a clear conformity statement against your specifications. A post‑report meeting is offered to discuss findings and, if relevant, to advise on source attribution or mitigation strategies.

Partner with Us for Reliable, Regulatory‑Ready PAH Analysis

PAH contamination is a global concern requiring precise, defensible analytical data. Our testing service provides the scientific depth, technical flexibility, and regulatory expertise necessary to ensure your PAH monitoring programs deliver actionable, compliant results. We have supported environmental agencies, manufacturing companies, consulting firms, and research institutions in achieving their PAH testing objectives with confidence.

We invite you to contact our technical experts to discuss your specific PAH testing needs—whether for compliance screening, source identification, or long‑term monitoring. With our advanced analytical arsenal, accredited quality systems, and deep environmental chemistry expertise, we provide the clarity and confidence you need to safeguard health and the environment. Request a detailed proposal or schedule a technical consultation today and take the next step towards superior PAH analysis solutions.